#include <stdio.h>
 
// MSB is at beginning
void serializeInt(char* buff, int num){
    buff[0] = (num >> 24) & 0xFF;
    buff[1] = (num >> 16) & 0xFF;
    buff[2] = (num >> 8) & 0xFF;
    buff[3] = num & 0xFF;
}
 
int deserializeInt(char* buff){
    return (buff[0] << 24) + (buff[1] << 16) + (buff[2] << 8) + buff[3];
}
int main(void) {
	char buf[4];
	int num = 0;
	serializeInt(buf, num);
	printf("%d\n", deserializeInt(buf));
	return 0;
}
 
 
 

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